Effect of liquid extract of Pandanus amaryllifolius leaves on broiler performance, digestive tract size and immune response under high stocking density

Abstract

This study aimed to examine the effects of administration of a liquid extract of pandan leaves (Pandanus amaryllifolius) added to commercial rations on the performance, size of digestive tract and immune response of broiler chickens. The materials used in this study were 280 broiler chickens aged 8-35 days with an average initial weight of 118.15±0.65 grams (density of 16 chickens/m²) and Pandan Leaf Liquid Extract (PLLE). The study was conducted using a Completely Randomized Design (CRD) with PLLE administration levels (control, 30, 60, 90, and 120 ml/kg) with four replications. The parameters observed were the performance, digestive tract size, and lymphoid organs. Data were analyzed using analysis of variance with a 5% accuracy level and Duncan’s test at a 5% level. The results showed that the administration of PLLE at a level–30-120 ml/kg significantly improved (P < 0.05) feed intake, final body weight, feed conversion ratio, live weight, carcass weight, carcass percentage, and relative weight of lymphoid organs. Using PLLE, we were able to maintain digestive tract size in the form of duodenum and jejunum relative weight, duodenum and jejunum relative length, and duodenum weight/length ratio. Administration of PLLE at a dosage of 120 ml/kg is optimal for enhancing the performance, size of digestive tract and immune response of broiler chickens raised under high-density conditions.